Punch-press.



E. e. DANIELS.

PUNCH PRESS.

APPLICATION FILED NOV. 25. 1914.

gamma m 1021672752 ,Eciwajz Gj 6655 MAL/Q16) E. a. DANIELS;

PUNCH PRESS.

' APPLICATIQN FILED NOV-25.1914.

Patented Mar. 26, 1918.

2 SHEETS-SHEET 2. In I 1 57 i. w ll ZQifZSSS:

TE w re PATENT oration EDWIN G. DANIELS, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE CLEVELAND PUNCH 8t SHEAR WORKS COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

PUNCH-PRESS.

Specification of Letters Patent.

Patented Mar. 2c, 1918.

Application filed November 25, 1914. Serial No. 873,933.

T 0 all whom it may concern:

Be it known that I, EDWIN G. DANIELS, a citizen of the United States, residing at 10853 Prospect ave, in Chicago, county of Cook, and State of Illinois, have invented new and useful Improvements in Punch- Presses, of which the following is a specification.

This invention relates to improvements in punch presses, and more especially to that part of the press which operates directly upon the piece of work which. is being punched. which this invention more particularly relates comprises a suitable frame structure supportinga reciprocatingly movable head 7 which carries a tool, comprising a toolholder and a punch or die, for dr vingnnto or through the work; and "the device also includes mechanisms for IiLlSlIlgfillCllOWGI'lIlg the driving head at the will of the operator, such mechanisms not constituting any part of the present invention. In the use of such a press upon lar e and heavy pieces of work difficulty is usually encountered in accurately locating the pieces to be punched with respect to the punching tool in order that the latter may strike" in the right place. Hereto fore presses have beenmade in which the tool, after being withdrawn from the Work, is again lowered and allowed to; rest momentarily upon the work and then raised from the work. This invention provides a reciprocating head inwhich the tool holder is carried in such manner that it is-released at the end of the up-strokeof the reciprocating head, allowing the punch to drop down upon the work and remaiucontinuously and freely-resting u on such work to aid properly locating the-sameg As stated above, presses have beenmade heretofore in whlch the punch, after the 0perative*stroke,-is al lowed to restmomentarily on the work and is then raised. In such devices, if the work is not properly located during such time, the operator. must wait until the punch again descends upon the work before he 'isable to further adjust the same; 6 thus losing the time that the punchis 01% the work; Inthis invention, after the operative stroke, the punch is allowed-ate "rest continuously on the work, thus permitting the operator to ose all the timef-toadjust the same"; and accomplish this asquickly as possi-ble; 1 Upon thaw dein wasadie ed-thereciproe A punch press of thewtype to ing head is allowed to again descend on an operative stroke grasping the tool holder on this stroke so that the material may be stripped from the punch on the succeeding up-stroke. A device embodying the principles of the present invention is illustrated in the accompanying drawings, in which;

Figure 1 is a view of the device in side elevation.

Fig. 2 is a horizontal section on the line 22 of Fig. 3, but with parts omitted for better clearness,

Fig. 3 is a transverse vertical the line 3-3 of Fig. 2. V

As shown in; said drawings 10 indicates the lower end of the reciprocating head of the punch press and 11 the adjacent portion of the frame structure, those parts of the machine which are not here shown being of approved form, and their particular design not constituting any part of the present invention. r a To theunder surface of the reciprocating head 10 is secured aheavy plate 15 and below this plate is bolted the part 18 carrying (as hereinafter more particularly described) a tool holder 51 to which is attached the punching implement 20 by means of a nut 52 screwed onto the lower threaded end 53 of the tool holder 51, as shown. The lower part of thenut 52 is milled at 54 to aid in turning it. guide for the tool holder 51, is made with an integral horizontal flange 21 fitting under the plate 15, and with a vertical opening 22 through its length in which the tool holder 51 makes a sliding fit. The tool holder 51is made with a head or enlargement 23 at its upper end and in the down "stroke of the reciprocating headlO the punch 20 attached to its lower end is forced into the work by the pressure of the plate 15 upon this head or enlargement 23; while it is withdrawn or stripped from the work in the succeeding up stroke-by a pair of jaws or gags 26, 26, which grasp the shank of the tool holder 51 below-its head 23. p

The gags 26 slide horizontally in guidewaysrextendinglaterally front the enlarged ,upper portion ofthe vertical bore .22;through the part 18, and below them are two hori' zontalgshafts i 28, 28, which, "are .journ ald in .therpart 18.1 ,To each of. theseshafts: is fixed w nk rs- 0 t -a ball at its-I pp r section on The part 18-, which forms a end engaging in an opening in the corresponding gag, so that by the rotation of these shafts the gags are moved inward and outward. At the opposite ends of the shafts 28 are fixed bell crank levers 85, each including a substantially horizontal arm and arm extending vertically away from the horizontal arm. The two vertical arms are connected by a spring lO acting to draw them together and bring the gags into engagement with the tool holder 51; and the gags are separated on up strokes of the reciprocating head 10 by the horlzontal arms 37 coming into contact with fixed stops L3, 43, extending downward from the Plfllll press frame 11, these stops belng threaded and provided with set nuts H, 44, to permit of vertical adjustment.

In the operation of the press, the gags are automatically withdrawn during the latter part of each upstroke of the reciprocating head 10, and the tool holder 51 with its punch 20 is allowed to drop down upon the Work, where it may remain continuously and rest with its own weight only upon and in contact with the work to aid in properly locating the latter. The reciprocating head 10 is then caused to descend for an operative stroke to force the punch 20 through the work. During this down stroke, the spring 40 pulls the arms 35 toward each other, pressing the gags 26 inwardly and, by the time the levers 37 have disengaged the stops 43, the gags will have been moved into substantial engagement with the shank of the tool holder-beneath the head 23. Further downward movement of the reciprocating head will force the punch through the work. On the succeeding upstroke of the head, the tool holder will be drawn upwardly by engagement of the gags with the shoulder formed below the head 23, and the punch 20 will be stripped from the metal. During this operation, the metal is prevented from rising by a stripper 50 which is fixed to the punch press frame 11 and under which the metal is placed upon the die 61 of the press.

I claim as my invention:

1. In a machine of the character described, the combination of a work supporting memher, a movable member or head reciprocable toward and from the work supporting member and having a tool-engaging abutment, a tool reciprocably mounted in the movable member, means other than the abutment for automatically connecting the tool to the head during the movement of the head toward the work, and means for automatically breaking such connection when the head has moved a predetermined distance from the work, 7

2. In a machine of the character described, the combination of a work supporting member, a movable member or head reciprocable toward and from the work supporting member,a tool reciprocably mounted in the movable member, an abutment carried by the movable member and adapted to be brought into and out of operative relation to the tool, means other than the abutment for automatically connecting the tool to the head for the purpose of moving the tool away from the work, and means for automatically breaking such connection when the head has moved the tool a predetermined distance from the work.

3. In a machine of the character described, the combination of a work supporting member, a head reciprocable toward and from said member, a tool reciprocably mounted in said head, the head having an abutment which'is adapted to engage the tool when the head is moved toward the work, a plunger reciprocably mounted in said head and adapted to engage the tool thereby'to connect the same to the head during the movement of the head away from. the work, and adjustable means other than said abutment for automatically breaking the connection between the plunger and the tool when the head has moved a predetermined distance from the work.

4. The combination, with a reciprocable head and a tool, said head having an abutment adapted to engage the tool on the power stroke of the head, of means other than the said abutment for automatically disconnecting the tool from the head on the return stroke of the head.

5. In a machine of the character described, the combination, with a reciprocable head, of a tool carried thereby and longitudinally movable thereof, gags adapted and arranged to engage said tool, and means for automatically moving said gags toward and from the tool, said means including shafts carried by the head and each having an arm engaging a gag, bell-crank levers on each shaft, a spring connecting corresponding bell-crank arms of said shafts, and stops located in the paths of movement of and adapted to engage the other bell crank arms of said shafts and thereby to rock said shafts in opposition to said spring. l

6. In a machine of the character set forth, the combination, with a reciprocable head, of a tool carried thereby and longitudinally movable thereof, a tool-engaging member carried by said head, and means for automatically moving said member toward and from said tool, said means including a shaft carried by the head, a projection on said shaft adapted to engage said member, a second projection'carri'ed by said shaft, a stop adapted and arranged to engage such second projection to move the said member away from said tool, and means tending to move said member toward said tool.

7. In a machine of the character set forth,

the combination, with a reciprocable head, of a tool carried thereby and longitudinally movable thereof, a tool-engaging member carried by said head, and means for automatically moving said member toward and from said tool, said means including a shaft carried by said head, an arm carried by said shaft adapted to engage said member, a pair of arms projecting from said shaft, a spring connected to one of said arms and to said head, and a stop in the path of movement of the last-mentioned arm and adapted to rock said shaft in opposition to said spring.

8. In a machine of the character described, the combination, with a work-supporting member, of a reciprocable head having a bore, a tool reciprocably mounted in said bore and having a shouldered portion, said head having a guideway intersecting the said bore, a gag in said guideway adapted to engage beneath the shouldered portion of the tool, means tending to hold said gag in shoulder-engaging position, and means for automatically moving the gag outwardly in its guideway when the head shall have moved a predetermined distance away from the work-supporting member.

9. In a machine of the character described, the combination, with a work-supporting member, of a reciprocable head having a bore, a shouldered tool reciprocably mounted in said bore, said head having a pair of guideways intersecting the said bore, a gag in each guideway adapted to engage beneath the shouldered portion of the tool, means tending to hold said gags inshoulder-engaging position, and adjustable means for automatically moving each gag outwardly in its guideway when the head shall have moved predetermined distances away from the work-supporting member.

10. In a machine of the character described, the combination, with a work-supporting member, of a reciprocable head, a tool reciprocably supported by said head, means acting automatically in a movement of the head toward the work-supporting member to engage the tool therewith to permit it to be withdrawn from said member in a movement of the head away from the work-support1ng member, and means acting automatically in the movement of such said members with the tool to permit the latter to be withdrawn from said support in a movement of the head away from the support, and means acting automatically in the movement of such head away from the work support for moving said members away from the tool and permitting them to move toward said support.

12. In a machine of the character described, the combination, with a work-supporting member, of a reciprocable head movable toward and from the work supporting member and provided with a bore having an enlarged upper end, a tool having a head mounted in the enlarged upper portion of said bore and a shank in the reduced portion of said bore, a gag movable in a guideway in said head intersecting the enlarged portion of said bore, means normally holding said gag in operative, relation to and beneath the head of said tool, and means for automatically moving the gag away from the tool in and through the movement of the lsead away from the work supporting mem- 13. In a machine of the character described, the combination, with a work-supporting member, of a reciprocable head hav ing a bore provided with an extended enlarged portion and with a reduced portion therebeneath, a tool having a head adapted to reciprocate in the enlarged portion of the bore and a shank adapted to reciprocatewithin the reduced portion of the bore, said head having guideways intersecting the enlarged portion of the bore, a gag in each guideway, means normally holding said gags in their inward position, and means operated by the movement of the head away from the work-supporting member for automatically moving the said gags outwardly in their respective guideways.

14. In a machine of the character described, the combination, with a work-supporting member, of a reciprocable head hav- 1 ing a bore, a tool mounted. in said bore and having a shouldered portion, said head having a guideway intersecting the said bore, a gag in said guideway adapted to engage beneath the shouldered portion of the-tool, meanstending to hold said gag in shoulderengaging position, and means operative by the movement of the head away from the work-supporting member for automatically moving the gag outwardly in the guideway to disengage said shoulder.

In witness whereof, I havehereunto subscribed my name in the presence of two witnesses this 18th day of November, 1914.

EDWVIN G. DANIELS.

Witnesses:

Geo. H. KERRIGAN, j W. R. MANocK.

scales at this patent may be obtained for five cents each, by addressing the Gommissioner of Patents,

on, D, G. 

